c++ - 使用迭代器连接 vector 中的元素

Question

string s1 = "bob"; 
string s2 = "hey";
string s3 = "joe";
string s4 = "doe";

vector<string> myVec;

myVec.push_back(s1);
myVec.push_back(s2);
myVec.push_back(s3);
myVec.push_back(s4);

如何在 myVec 上使用迭代器输出“bob hey”“bob hey joe”“bob hey joe doe”？

任何帮助提示或帮助将不胜感激

Answer 1

以下应该有效:

for (auto it = myVec.begin(), end = myVec.end(); it != end; ++it)
{
    for (auto it2 = myVec.begin(); it2 != (it + 1); ++it2)
    {  
        std::cout << *it2 << " ";
    }
    std::cout << "\n";
}

示例输出:

bob 
bob hey 
bob hey joe 
bob hey joe doe

Live Example